Process of improvement of aldehyde resins



Ratented Apr. 1, 1924.

UNITED STATES PATENT OFFICE.

WILLY O. HEBBMANN AND HANS DEUTSCH, F MUNICH, GERMANY, ASSIGNORS 1'0 CONSORTIUM FUR ELEKTRDCHEMISGHE INDUSTRIE G. M. B. H., OF MUNICH, BA-

VARIA, GERMANY.

PROCESS OF IMPROVEMENT 0F ALDEHYDE RIBINS.

No Drawing.

To all whom it may concern: 7

Be it known that we, WILLY O. HERRMANN and HANS DnUTsoH, citizens of Germany, residing at Munich, Germany, 20 Zielstattt strasse, have invented certain new and useful Improvements in Processes of Improvement of Aldehyde Resins, of which the following is a specification.

The products obtained by condensation re- 10 spectively polymerization of aldehydes with condensing agents may as we have shown otherwise be employed in most cases like shellac, copal, amber and the like. They are soluble in the ordinary organic solvents but they are not soluble like shellac e. g. in watery solutions of boraxand soda. It is the solubility in these watery solutions which is characteristic e. g. for shellac and which enables its employment in the manufacture of dressings and the like.

Our invention now consists in that we have discovered that it is ossible to obtain from aldehyde-resins pro ucts having the characteristic solubility in watery solutions of borax and soda. This is attained by subjecting aldehyde-resins to an oxidizing treatment. A consequence of this oxidizing treatment is the bleaching and hardening of the resins.

ferent manners. Thus the aldehyde resins may be subjected to the oxidizing treatment in the molten state or dissolved or suspended in a solvent. The oxidizing procan as may be supported by catalyzers.

Example 1.

10 parts of aldehyde resin are dissolved in 100 parts of glacial acetic acid and ozonized to oxygen is then ledthrou h this solution.

Example 2. Into a solution of 20 parts of aldehyde resin in 100 parts of glacial acetic acid, and so after adding 0.02 parts of acetate of manganese, oxygen is led for several hours whilst The process may be carried out in dif- Application filed August 8, 1922. Serial No. 579,527.

well stirring. The resin is then precipitated Into a suspension of 10 parts of aldehyde resin in parts of water and after adding 0.01 parts of ermanganate oxy en is led. The product 0 tained is separate water.

The products thus. obtained may be employed directly but they may also be melted and brought in the form of pieces, plates, sheets or the like. The molten resin may also be rolled out in a rolling apparatus to shellac-like sheets.

These products may also be subjected to a hardening process by heating to higher temperatures or by any other means known for ardening resins e. g. by addition of glycerin or oxides of metals and the like.

The aldehyde-resin products which by the oxidizing treatment have become soluble in a watery solution of borax and soda like shellac may be employed in the manufacture of dressings, hat-stiifenings and the like. Besides this they may be used for other purposes like shellac, copal, amber and the like. They are also soluble in the solvents ordinarily used in the manufacture of varnishes, means for polishing and impregnating purposes.

We declare that what we claim is:

1. Process of improvement of aldehyderesins which comprises subjecting aldehyderesins to an oxidlzing treatment.

2. Process of improvement of aldehyderesins which comprises subjecting aldehyderesins to an oxidizing treatment, the oxidizing agent being an ozone containing as.

3. rocess of improvement of al ehyderesins which comprises subjecting aldehyderesins to an oxidizing treatment in the presence of a catalyzer.

4. Process of improvement of aldehyderesins which comprises subjecting aldehyderesins to an oxidizing treatment, remelting .the product obtained and hardening it hereafter by a hardening process.

5. Process of im rovement of aldehyderesins which comprises subjecting aldehyderesins to an oxidizing treatment, remelting from the the product obtained and heating it at the product obtained and adding an oxide higher temperature. of a metal to the molten resin. I

6. Process of improvement of aldehyde- In testimony whereof we aflix our signaresins which comprises subjecting aldehlydetures in presence of two witnesses. 5 resins to an oxidizing treatment, 'reme ti'n the product obtained and adding a harden 3 gg g ing acting compound to the molten resin. U C

7. Process of improvement of aldehyde- Witnesses: resins which comprises subjecting aldehyde- ALExIs PHILIPPOFF, l0 resins to an oxidizing treatment, remelting ALEXANDER DE Soro. 

